Jeff McLane and Zach Berman

BETHLEHEM, Pa. -- Brent Celek suffered a mild sprain in his right knee during practice Thursday, the Eagles said.

The Eagles tight end caught a pass during the early portion of the first full squad practice of training camp, but left soon after. Celek was later seen walking out of the locker room at Lehigh University wearing a wrap around his knee.

"I'll be good," Celek said. "Promise."

Celek entered camp completely healthy, according to the team. This offseason, he underwent hip surgery and had a sports hernia repaired. After a slow start last season, Celek finished strong catching 53 passes for 738 yards and five touchdowns in the final 11 games.

The Eagles flirted with the idea of bringing in another tight end to push backup Clay Harbor. They worked out free agent Visante Shiancoe on Tuesday, but the 32-year-old vet signed with the Patriots later that day. Jeremy Shockey, a free agent the Eagles could have interest in, remained unsigned.

Harbor, Brett Brackett filled in for Celek with the first team for the rest of practice. Undrafted rookie Chase Ford is the fourth tight end in camp.

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The Eagles return to two-a-day practices tomorrow and will wear full pads and hit for the first time on Saturday.